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(No Model.) 3 Shets-Sheet 1.

A. MILLER.

GAR. VBNTILATOR.

No. 325,003. Patented Aug. 25, 1885.

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(No Model.)

A. MILLER.

GAR VENTILATOR.

Patented Aug. 25, 1885.

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(No Model.)

A. MILLER.

GAR VENTILATOR.

Patented Aug @M1/m Miller #3y 15mm 5%.

NTTE STATES PATENT OEEICEO ADAM MILLER, or LONDON, ENGLAND.

CAR-VENTI LATO R.

SPECIFICATION forming part; of Letters Patent No. 325,003, dated August 25, 1885.

Application filed June 18, 1885.

T all whom it may concern:

Be it known that LADAM MILLER, a citizen of England, residing at Lime street, in the city of London, England, have invented a new and useful Apparatus for Ventilating Railway and other Carriagcs, of which the following is a speciiication.

My invention relates to ventilators applicable on the roofs of railway and other carro riages for utilizing the current of air resulting from the motion of the carriage in effecting withdrawal of the foul air therefrom.

Ventilators according to my invention may be varied in form, all acting, however, on the I5 known principle that a current of air suitably directed across an aperture tends to draw air therefrom. The accompanying drawings illustrate three forms of ventilators which I adopt and which I will now describe.

2o No. I. This form (shown by Figure l a transverse section on E F, Fig. 2 a longitudinal section on C D, and Fig. 3 a sectional plan on A B) has a central tube, x, of elongated rhomboidal shape, open at the bottom to the compartment or carriage, and open also at the top, which is trumpet-mouthed, into the upper part, u, of the easing in which itis inclosed. This casing, which is of rectangular form, is open at both ends, so that 3o there is a free current of air through the two side passages, z z, which are separated from internal spaces, y y, around x by partitions,

through which there are lateral openings o o.

The foul air ascends x into the roofspace u of the casing, whence it descends into the spaces y y, and passes by the openings o o to join the currents along c z.

No. 2. In this forni (illustrated by Fig. l a transverse section on E F, Fig. 2 a longi- 4o tudinal section on C D, and Fig. 3 a sectional plan on A B) the roof-space is dispensed with,

(No model.) Patented in England April 1T, 1c`85, No. 4,762.

the foul air taking the course indicated by the arrows up the elongated rhomboidal tube x, down the surrounding spaces y y, to `join the currents along e z.

No. 3. In this form (illustrated by Fig. I a transverse section on E F, Fig. 2 a longitudinal section on C D, and Fig. 3 asectional plan on A B) the uptake-tube x is rectangular, opening into a roof-space, u, which is partially 5c separated from the side passages, z z, by shield-plates sand sloped partitions w, having openings at y y.

It will be seen that in the several forms of ventilators above described the communica tion with the carriage or compartment is quite roofed over, so that while there is free passage for air upward, no snow or wet can get access to it.

Having thus described the nature of my in` 6c vention and the best means I know for carrying the same into practical effect, I claim- A ventilator for a railway car, consisting of a casing having a closed top and sides and open ends, a Vertical tube within said casing, 6= open at top and bottom, and terminating below the top of the casing, and pendent partitions within said casing extending from the walls thereof,and termi hating below the upper end or mouth of the vertical tube, to form a 7c passage between the sides of the tube and the said partition, all substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 4th day of June, 1885.

ADAM MILLER.

IVitiiesses:

CHAs. G. MITCHELL, JNO. I. M. MILLARD. 

